Prevent infinite looping in CPDF_Parser::LoadAllCrossRefV5().

core/include/fpdfapi/fpdf_parser.h

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #ifndef CORE_INCLUDE_FPDFAPI_FPDF_PARSER_H_
 #define CORE_INCLUDE_FPDFAPI_FPDF_PARSER_H_
 
 #include <map>
@@ skipping 464 matching lines @@
 
   FX_BOOL LoadAllCrossRefV4(FX_FILESIZE pos);
 
   FX_BOOL LoadAllCrossRefV5(FX_FILESIZE pos);
 
   bool LoadCrossRefV4(FX_FILESIZE pos,
                       FX_FILESIZE streampos,
                       FX_BOOL bSkip,
                       FX_BOOL bFirst);
 
-  FX_BOOL LoadCrossRefV5(FX_FILESIZE pos, FX_FILESIZE& prev, FX_BOOL bMainXRef);
+  FX_BOOL LoadCrossRefV5(FX_FILESIZE* pos, FX_BOOL bMainXRef);
 
   CPDF_Dictionary* LoadTrailerV4();
 
   FX_BOOL RebuildCrossRef();
 
   FX_DWORD SetEncryptHandler();
 
   void ReleaseEncryptHandler();
 
   FX_BOOL LoadLinearizedAllCrossRefV4(FX_FILESIZE pos, FX_DWORD dwObjCount);
@@ skipping 512 matching lines @@
                        FX_DWORD src_size,
                        const CPDF_Dictionary* pDict,
                        uint8_t*& dest_buf,
                        FX_DWORD& dest_size,
                        CFX_ByteString& ImageEncoding,
                        CPDF_Dictionary*& pImageParms,
                        FX_DWORD estimated_size,
                        FX_BOOL bImageAcc);
 
 #endif  // CORE_INCLUDE_FPDFAPI_FPDF_PARSER_H_